1230545 has 16 divisors (see below), whose sum is σ = 1617408. Its totient is φ = 894720.

The previous prime is 1230539. The next prime is 1230547. The reversal of 1230545 is 5450321.

1230545 = 261² + 262² + ... + 277².

It is not a de Polignac number, because 1230545 - 2⁴ = 1230529 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1230547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2402 + ... + 2868.

It is an arithmetic number, because the mean of its divisors is an integer number (101088).

2^1230545 is an apocalyptic number.

It is an amenable number.

1230545 is a deficient number, since it is larger than the sum of its proper divisors (386863).

1230545 is a wasteful number, since it uses less digits than its factorization.

1230545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1230545 is about 1109.2993284051. The cubic root of 1230545 is about 107.1599494425.

Adding to 1230545 its reverse (5450321), we get a palindrome (6680866).

The spelling of 1230545 in words is "one million, two hundred thirty thousand, five hundred forty-five".